Adjustable support for light fixtures

ABSTRACT

A substantially L-shaped supporting member 31 is mounted in a slot 67 in a light fixture. Both legs are wider than the slot. Recess 71 which forms a web to connect the legs is slightly wider than the thickness of the fixture wall. The web is narrower than the slot. The support can be rotated 90* when the nut 74 is withdrawn from hole 68 at the end of the slot.

United States Patent 1 McFarlin Jan. 9,1973

ADJUSTABLE SUPPORT FOR LIGHT FIXTURES Ralph M. McFarlin, Pasadena, Tex.

Assignee: Esquire, Inc., New York,v N.Y.

Filed: Dec. 7, 1971 Appl. N0.: 205,579

, Related US. Application Data Division of Ser. No. 26,705, April 8,1970, Pat. No. 3,652,847.

Inventor:

US. Cl. ..240/67, 248/207, 248/223,

. 248/244 Int. Cl ..F2lv 21/14 Field of Search .....248/207, 244, 245,223;

[56] References Cited UNITED STATES PATENTS 2,628,806 2/1953 O'Brien..248/207 FORElGN PATENTS OR APPLlCATlONS 279,l64 .ll/l95l.

Primary Examiner-Samuel S. Matthews Assistant Examiner-Michael HarrisAttorneyHyer, Eiekenroht, Thompson & Turner.

[57] ABSTRACT A substantially L-shaped supporting member 31 is mountedin a slot 67 in a light fixture. Both legs are wider than the slot.Recess 71 which forms a web to connect the legs is slightly wider thanthe thickness of the fixture wall. The web is narrower than the slot.

The support can be rotated 90 when the nut 74 is withdrawn from hole 68at the end of the slot.

1 Claim, 14 Drawing Figures Switzerland ..248/244 PATENTEUJAN 9197s saw1 OF 1 PAIENIEDJAI' 91915 sum 3 UF 4 FIG. 5

(90 TURNED) WW a ma 3.710.096 sum 3 or 4 I FIG. 8

PAIENTEDJAN ems sun-:1 u 0F 4 ADJUSTABLE SUPPORT FOR LIGHT FIXTURES Thisis a division of application Ser. No. 026705, filed Apr. 8, 1970 nowU.S. Pat. No. 3,652,847.

This invention relates generally to light fixtures. in one of its novelaspects, it relates to improvements in recessed fixtures of the typewhich are installed and/or relamped from outside the wall in which therecess is formed, and thus beneath the ceiling in the case of a recessedceiling fixture. In another of its novel aspects, it relates toimprovements in devices for mounting capacitors or like parts within alight fixture.

One advantage of recessed fixtures of this type is that they dontrequire access from the inside of the wall, or above the ceiling, wherespace is usually at a premium and relatively remote, during installingor relamping. Normally, such a fixture includes a housing which fitsclosely within the lower end of the recess and is supported from thewall surrounding the recess in such a way that its lower end may beadjusted toward or away from the open lower end of the recess. A windowover the lower end of the housing and a trim plate spanning the openlower ends of the housing and recess are removable from the housing inorder to permit relampmg.

In prior fixtures of this type, a reflector on the side of the lampopposite the window has permitted access to various parts within thefixture behind the reflector,

such as wiring terminals, ballasts, and capacitors, only abovementioned, space is usually at a premium and relatively remote. Also,the relatively close fit of the housing within the lower end of therecess ordinarily requires that it be supported from the wall by partswhich may be manipulated from'within the housing. Heretofore, the meansfor providing this support, especially in such a manner as to permit thelower end of the housing to be adjusted toward and away from the openend of the recess, has been awkward and cumbersome to manipulate, and insome cases unsightly.

lt-is also desirable in fixtures of this type that the window and trimplate be supported in such a way that they maybe adjusted toward andaway from the open end of the recess, so as to accommodate differentwall thicknessesQThe means for so supporting the window and trim platehave also often been unsightly, and in any event difficult to manipulatefrom outside the wall and thus below the ceiling in the case of recessedceiling fixtures.

An object of this invention is to provide a fixture of this general typein which access may be had to various parts within the housing of thefixture and behind the reflector from outside the wall, or beneath theceiling.

Another object is to provide such a fixture which may be installed andsupported from the wall by parts which are hidden from view outside thewall, and which are easily and quickly manipulated from outside thewall.

Still another object is to provide a simple and inexpensive device foreasily and quickly mounting various parts, such as capacitors, in thefixtures.

These and other objects are accomplished, in accordance with theillustrated embodiment of the invention, by a light fixture having ahousing with side walls and anopen lower end for fitting relativelyclosely within the lower end of the recess in a ceiling or the like, anda reflector having an open lower end of a size for passing closelythrough the open lower-end of the housing. The lower end of thereflector is releasably attached to the side walls of the housing so asto support an electrical socket therein in. position to receive a lampbetween the reflector and the lower end of the housing. Moreparticularly, the means for so attaching the reflector to the housing isaccessible from the beneath the ceiling, whereby it may be manipulatedto permit the reflector to be moved downwardly through the open lowerend of the housing,so that access may be had from beneath the ceiling toa ballast and other parts in the housing above the reflector. v

The housing is supported from the recess in a manner to permit itselevation to be adjusted relative to the recess in the ceiling, and themeans for attaching the reflector to the housing permits the elevationof the reflector to be adjusted relative to the ceiling. In this way,both the housing and reflector may be adjusted relative to the lowerside of the ceiling and to one another.

In the illustrated embodiment of the invention, the reflector has aframe about its lower end and a downwardly turned flange about the framefor fitting closely within the housing above its open lower end. Thetrim plate is L-shaped and has one leg fitting closely within thedownturned flange on the reflector frame and another leg extendingoutwardly to cover the side walls of the housing and the separationbetween the side walls and the lower end of the recess. Moreparticularly, both the reflector and the trim plate are releasablyattached to the housing by fasteners which extend through the downturnedflange and one leg and are accessible from below the ceiling forattaching them to the side walls of the housing.

The window has a frame which fits closely within the one leg of the trimplate so as to close the window opening in the lower end of the housingand conceal the fasteners attaching the reflector flange and trim plateto the housing. More particularly, the window is removably supported byextendible fasteners which suspend the window frame from the reflectorframe, and the window frame includes a wall having a recess on its innerside to receive a pane of glass and a flange on its outer side having anouter edge fitting closely within the downturned flange. The extendiblefasteners are connected to the window frame within a space between thereflector frame and flange on the window frame, so that they are alsoconcealed.

In accordance with another novel aspect of the present invention,opposite side walls at the lower end of the housing have slots thereinand enlarged holes at one end of the slots for receiving substantiallyL-shaped supporting members, one for each slot, to support the housingwithin the recess in such a manner that it may be adjusted toward andaway from the lower end of the recess. More particularly, the supportingmembers are so constructed as to permit them to be installed andmanipulated from within the housing into positions in which they provideoutwardly extending flanges adapted to seat on the inner edges of therecess and to be moved between different positions lengthwise of theslot.

In another novel aspect of the invention, one of the electrical partsfor the fixture, and particularly the capacitor therefor, is mounted ona bracket which includes a base adapted to be attached to a part of thefixture, and a plate to which the capacitor may be releasably attachedand releasably connected to the base in such a manner as to permitremoval and replacement of the capacitor with respect to the base with aminimum of time and effort.

In the drawings, wherein like reference characters are used throughoutto designate like parts:

FIG. 1 is a view from below and to one side of the lower end of thefixture installed within the ceiling,

with a portion of the ceiling being broken away for illustrativepurposes;

FIG. 2 is a vertical sectional view of the fixture of FIG. 1, on anenlarged scale and as seen along broken line 2--2 of FIG. 1;

FIG. 3 is another vertical sectional view of the fixture, as seen alongbroken line 3--3 of FIG. 1;

FIG..4 is an enlarged sectional view of a portion the lower edge of thefixture;

' FIG. 5 is a bottom plan viewof the fixture, as seen along broken line5-5 of FIG. 3;

FIGS. 6 and 7 are side views of the fixture during steps preparatory toits installation within the ceiling recess;

FIG. 8 is an enlarged perspective view of the device mounting acapacitor on a wall of the fixture;

FIG. 9 is a side view of the device and capacitor shown in FIG. 8, butwith a plate of the device swung to aposition above the base thereofduring a step in the installation or replacement of the capacitor;

FIG. 10 is a perspective view of the L-shaped member for use insupporting the fixture housing within the recess;

FIGS. ll, 12 and 13 are views of the supporting member and slot andenlarged hole in a side wall of the housing during installation of themember into supporting position with respect to the wall; and

FIG. 14 is a cross'sectional view of the member secured in supportingposition with respect to the wall.

As can be seen from FIGS. 1, 2 and 3, the over-all fixture, which isindicated in its entirety by reference character 20, is installed withina ceiling 21 having a recess with an open lower end 22. Such an openingmay be provided, for example, by removal ofa panel from a conventionalgrid type ceiling support. In any event, the fixture 20 comprises ahousing 23 having an open lower end 24 which fits relatively closelywithin the ceiling opening 22 when the housing is supported from theceiling, in a manner to be described below.

As best shown in FIGS. 2, 5, 6 and 7, the lefthand side of the housingis outwardly enlarged to provide space for a ballast B mounted on asupport 26 secured to the housing. The righthand side of the fixtureincludes a separate compartment 27 which is mounted on the righthandside of the housing 23 by a bracket 28. As best shown in FIG. 2, and aswill be described in' more detail to follow, a capacitor C is mounted onthe bottom wall of compartment 27. Also, wiring within the fixturehousing 23 and the compartment 27 is connected through a conduit 29connecting the righthand side of the housing with a front side of thecompartment 27.

The spacing of the compartment from the righthand side wall of thehousing 23 insulates the capacitor from the remainder of the fixture,and thus maintains its temremovable door 30 on the righthand sidethereof opposite the righthand side of the housing 23.

The cross-sectional area of the'entire fixture from one side to theother thereof is at least somewhat smaller than the cross-sectional areaof the ceiling opening 22, whereby the entire fixture, including thehousing 23 and compartment 27, may. be moved sideways upwardly throughthe ceiling opening, as illustrated in FIG. 6. Thuen, when the fixturehas cleared the upper end of the ceiling opening 22, it may be swung asindicated in FIG. 7, to position its lower end 24 for lowering intosupported position within the ceiling opening 22.

The housing is supported in the ceiling recess by means of supportmembers 31 which, as shown in each -of FIGS. 1 and 3, have portionswhich extend outwardly from the side walls of the housing for resting ona surface of the ceiling above the ceiling opening 22. As will bedescribed in detail to follow, the supporting members are moved into thesupporting position of FIGS. 1 and 3 only after the fixture has beenmoved into the ceiling recess above the opening 22, whereby they do notobstruct the free movement of the fixture sidewise through the opening22, as shown in FIG. 6.

More particularly, and as will also be described, the supporting membersare of such construction as to permit them to be moved into and fixed inthe supported positions of FIGS. 1 and 3 from within the housing 23 andthrough the opening 22 of the ceiling recess, thereby avoiding the needfor manipulating them from above the ceiling.

The reflector R of the fixture has an upper end 32 and side walls 33which flare downwardly and outwardly to an open lower end. A frame 34about the open lower end of, the reflector has a downturned flange 35which, as best shown in FIG. 4, fits closely within the lower open endof the housing 23. An electrical socket 36 extends through a side wall33 of the reflector to receive a lamp L in front of the reflector, andthus between its upper and lower ends. The electrical socket 36 issupported on one sideof the reflector frame 34 by means of an arm 37welded or otherwise secured at its lower end to the reflector frame.

As best shown in FIG. 4, a trim plate T includes a lower laterallyextending portion 44 and a leg 45 extending upwardly from the inner edgeof the laterally extending portion 44 for abutment with the lower sideof the reflector frame 34 and fitting closely within the downturnedflange 35 of the frame. Thus, as will be apparent from FIGS. 2 and 3,whenthe trim plate is in its supported position, the laterally extendingportion 44 thereof spans the flange 35 on the reflector frame, theadjacent side wall of the lower end of the housing, and the separationbetween the housing wall and the opening 22 in the ceiling recess.

In this position, a hole through the upright leg 45 is aligned with ahole through the reflector frame flange 35, which in turn are alignedwith a vertical slot 46 in the side wall of the lower end of thehousing. A captive nut 47 or the like is slidable longitudinally withinthe slot 46 and has a hole therethrough aligned with the holes throughthe flange 35 and leg 45. Thus, a fastener 48 may be passed through thealigned holes and slots and manipulated from below the fixture andceiling to attach the reflector and trim plate in supported positions,or, when desired, detach them from the housing for removal through theopen lower end of the housing. More particularly, the captive nut 47 maybe moved longitudinally of the slot 46 to permit the reflector and trimplate to be supported at a desired elevation with respect to the loweropen end of the housing, thereby accommodating for different ceilingthicknesses.

A window W includes a pane 38 of translucent glass or otherlight-diffusing material received within a frame 39 thereabout. As bestshown in FIG. 4, the frame in cludes a wall 40 having a recess about itsinner side to receive the edges of the pane 38, and a flange 42 on itsouter side having an upturned end for fitting closely within theupturned leg 45 of the trim plate in the supported position of thewindow (FIGS. 1, 2 and 5). As also shown in FIG. 4, a gasket 43 isreceived within the recess 41 to sealably surround the outeredge of thepane and also seal against the lower side of the reflector frame 34 whenthe window is in supported position, whereby the interior of thereflector is maintained substantially dust-proof.

As will be apparent from FIG. 4, the flange 42 covers and therebyconceals the fasteners 48 from view from beneath the fixture andceiling. Thus, the inner ends of the fasteners are within a spacedefined between the frame 34 of the reflector and the flange 42 of thewindow frame, and between the wall 40 of the window frame and theupright leg 45 of the trim plate T. As shown in FIG. 4, the lower end ofa fastener 49 for removably supporting the window from the reflector isalso disposed within this space, and thus also concealed from view frombeneath the fixture.

As best shown in the drawings, these fasteners are vertically extensibleto permit the window to be moved downwardly from its upper positionacross the open lower end of the reflector, to a lower position beneaththe lower end of the reflector and the trim plate T, as shown in FIG. 3.In this latter position, the window may be tilted to a positionpermitting access to the lamp L within the reflector, or, if desired,removed entirely from beneath the housing.

Thus, the illustrated fasteners include upwardly and outwardly extendinglegs 50 which are urged outwardly against the opposite ends of slots 53in the reflector frame to the broken line position of FIG. 2 by atorsion spring 51 at the lower juncture of the legs. As best shown inFIG. 4, the torsion spring 51 surrounds a pin 52 which is removablyreceived through the wall 40 and upturned end of the flange 42 of thewindow frame 39. Thus, the fasteners will suspend the window in itsupper position until the window is pulled downwardly with sufficientforce to urge the legs inwardly, as shown in FIG. 3. In this lowerposition, hooks 52 on the upper ends of the legs 50 will engage the topside of the reflector frame and thus resist further lowering. In thelowermost position of the fastener, these hooks 52 are to raise thehooks and stress them inwardly for passing downwardly through the slots54.

From the foregoing, it will be apparent that when access is desired tothe interior of the housing above the reflector R so as to replace theballast B or otherwise repair or replace parts within the housing abovethe reflector, the window W may be moved downwardly to the position ofFIG. 3 to permit access to the heads on the inner ends of the fasteners48. At this time, the

fasteners may be backed out so as to release'both thereflector frame andthe trim plate from attachment to the side walls at the lower end of thehousing. This permits the reflector frame 34, and particularly itsdownturned flange 35, to be moved downwardly through the lower open endof the housing so as to remove the reflector from within the housing.The trim plate of course will move downwardly with the reflec' torinasmuch as the reflector frame 34 bears on the upper end of theupturned leg 45 of the trim plate, as will the window W due to itssupport from the reflector frame. In moving the reflector framedownwardly through the open lower end of the housing, it may benecessary to tilt the reflector somewhat to enable the arm 37 to movepast the lefthand side wall of the lower end of the housing.

As best shown in FIG. 4, there are channels on the upper and lower sidesof the laterally extending portion 44 of the trim plate. A thindecorative strip of flexible material may be bent across its width forsnapping into the lower channel. The upper channel may receive the legsof right angle members which bridge the mitered ends of the sides of thetrim plate T for connecting them together at their corners.

The device shown in FIGS. 8 and 9 for mounting the capacitor C withinthe compartment 27, and designated in its entirety by referencecharacter 55, includes a base 56 adapted to be secured to a wall of thecompartment 27 by screws 57 or the like, and a plate 58 releasablyconnected to the base for disposal longitudinally over the upper side ofthe base and adapted to support the capacitor C on its upper side awayfrom the base 56. Although the capacitor may be releasably secured tothe plate 58 in any suitable manner, it is shown attached thereto inFIGS. 8 and 9 by means of a strap 59 extending about it and a midportionof the plate 58.

The base 56 has a pair of longitudinally spaced-apart flanges 60 and 61extending laterally across the upper side thereof. The capacitorsupporting plate 58 also has a pair of flanges 62 and 63 extendinglaterally across the lower side thereof, and thus toward the upwardlyextending flanges 60 and 61 of the base 56 when the plate is over thebase. More particularly, the inner sides of the flanges 62 and 63 arespaced longitudinally of one another a distance at least some-whatgreater than the longitudinal spacing between the outer sides of theflanges 60 and 61, so that the lower side of the plate 58 may bedisposed longitudinally over the upper side of the base 56 with itsflanges 62 and 63 outwardly of the flanges 60 and 61.

The adjacent flanges at one end of the base and plate are hingedlyconnected to one another to permit the plate to be swung between itsposition over the base, as shown in FIG. 8, and a tilted position inwhich the flange 63 on its righthand end is raised above the flange 61on the. righthand end of the base 56. More particularly, the flange 62of the plate has an inwardly extending rib 64 which is partially roundin cross section to fit closely within an arcuate groove 64A along theouter side of the base flange 60, whereby the plate is guided forswinging between the positions .of FIGS. 8 and 9. More particularly, theportion of the rib 64 and groove 64A in which it fits is less than 180of circular extent, whereby the rib is free to move into and out of thegroove in a direction transverse to the length thereof.

The flanges on the righthand ends of the base and plate are adapted tobe releasably connected together, when the plate is inposition over thebase, so as to securely mount the capacitor C on the wall to which thebase 56 is secured. Thus, as shown, a screw 65 is threadedly connectedina hole in the flange 61 of the base for extension outwardly therefrom,and a central portion of the lower edge of the flange 63 on the plate 58is provided with a slot 66 for fitting over the threaded portion of thescrew. Thus, in the position of FIG. 9, or in another position in whichthe flange 63 on the plate 58 is above the flange 61, the rib 64 may bemoved into the groove 64A, and the screw 65 may be manipulated to movethe enlarged head on its outer end tightly against the outer end of theslot 66, and thereby securely hold the flange 63 and thus the plate 58in place. On the other hand, the screw may be backed off to permit theslot 66 to be moved upwardly away from the threaded portion of the screwand the plate to be swung upwardly to the position of FIG. 9, afterwhich the rib 64 may be moved out and to the left of the groove 64A topermit replacement and/or repair of the capacitor.

As previously described, and as best shown in FIG. 1, the L-shapedsupporting members 31 are adapted to be installed on the housing 23 insuch a manner as to provide outwardly extending portions for restingupon upper surfaces about the inner edges of the ceiling recess opening22. For this purpose, the opposite side walls 24 of the housing areprovided with holes therein consisting of vertical slots 67 havingenlarged holes 68 at their upper ends, one such opening being providedfor each supporting member 31. Generally, it is sufficient to providetwo such supporting members, and thus two such slots, at each of twoopposite side walls of the housing.

As best shown in FIG. 10, the L-shaped supporting member 31 has legs 69and 70 arranged at right angles to one another and being wider from onelateral edge to another than'the slot 67. The leg 70 which is adapted toprovide the outwardly extending supporting portion of the member 31 isthinner from one side to the other of the slot 67 to permit it to bepassed through from the inner to the outer side of the housing wall, asshown in FIG. 11. As a matter of fact, the other leg 69 of the member 31is of the same thickness, so that the two legs may be made from a singlesheet of material.

The opposite side edges of the leg 70 have recesses 71 formed therein toprovide a web 72 at the end of the leg 70 connecting it to the leg 69.These recesses are slightly wider than the thickness of the side wall 24of the housing, andthe web 72 is slightly narrower than the slot 67.Thus, as will be apparent from a comparison of FIGS. 11 and 12, afterthe leg 70 has been moved edgewise through the slot 67, the supportingmember 31 may be turned 90 to cause the recesses 71 to move over theinner edges of the slot 67, whereby the web 72 is located for slidinglongitudinally within the slot 67.

A pin 73 extends through the leg 69 of the support member 33 and is ofsmaller diameter than the slot 67 to permit it to be movedlongitudinally therein. A head 74 on the end of the pin 73 adjacent thewall 24, when the leg is moved through the slot 67, as shown in FIG. 11,is larger in diameter than the slot 67, but smaller than the diameter ofthe enlarged hole 68 at the upper end of the slot. Thus, after the leg70 has been moved through the slot, as shown in FIG. 11, and the supportmember rotated 90, the web 72 of the member may be moved upwardlythrough the slot67 to a level in which the head 74 in the pin 73 isopposite the inner side of hole 68. At this time, the head 74 may bemoved through the hole, and the. member 31 then moved back downwardly tocause the pin 73 to move longitudinally downwardly within the slot 67,as indicated by a comparison of FIGS. 12 and 13, until the horizontallydisposed leg 70 is at a desired supporting level.

At this time, the supporting member is fixed in position vertically withrespect to the side wall of the housingby means of a wing nut 75 on theend of the pin 73 opposite the head 74. Thus, as will be apparent fromthe drawings, the wing nut may be made up on the pin so as to urge itagainst the leg 67, and thereby tightly engage the leg 69 and wall 24 onopposite sides of the slot 67. On the other hand, the nut need merely bebacked off to permit vertical adjustment of member 31 with respect tothe housing.

It will thus be appreciated that the supporting member 31 can beinstalled in supporting position from within the housing 24. Conversely,of course, it may be removed from installed position from within thehousing 24 by a reversal of the above-described procedure. Summarizing,in order to install the member 31, it is first turned to the positionshown in FIG. 11, and the leg 70 is moved through the slot 67 from theinner side of the wall 24 within the housing to the outer side thereof.When the leg has moved outwardly as far as possible, the recesses 71 areopposite the side edges of the slot 67, so that the member may be swungto dispose the leg 70 in a horizontal position. At this time, the memberis moved upwardly to permit the head 74 and pin 73 to be moved throughthe hole 68, whereby the entire member may then be moved downwardly soas to permit it to be fixed in the desired vertical position.

As shown, there is a hole 76 in the leg 70, through which nails, screws,or the like may be passed for securing the leg to the upper supportingsurface within the ceiling.

From the foregoing, it will be seen that this invention is one welladapted to attain all of the ends and objects hereinabove set forth,together with other advantages which are obvious and which are inherentto the apparatus.

It will be understood that certain features and subcombinations are ofutility and may be employed without reference to other features andsubcombinations. This is contemplated by and is within the scope of theclaims.

As many possible embodiments may be made of the invention withoutdeparting from the scope thereof, it is to be understood that all matterherein set forth or shown in the accompanying drawings is to beinterpreted as illustrative and not in a limiting sense.

lclaim:

1. Apparatus for supporting a housing for a light fixture or the likewithin a recess, wherein opposite walls of the housing each has-a slottherein and an enlarged hole at one end of the slot, a substantiallyL-shaped supporting member for each slot, both legs of the member beingwider than the slot, and one of said legs being thinner than the slotand having recesses in each side edge thereof to provide a web at itsend connected to the other leg, said recesses being slightly wider thanthe wall thickness and said web being slightly narrower than the slot,so that said one leg may be passed edgewise through the slot from theinner side of the wall to dispose said recesses within said slot and thesupport member rotated 90 and moved in a direction to cause the web toslide longitudinally within the slot,

a pin extending through the other leg 'and being of smaller diameterthan the slot for passage therethrough, a head on the end of the pinwhich faces the wall when the one leg has passed through the slot, saidhead being larger than the slot but smaller than the hole at one endthereof, so that after the one leg has been passed edgewise through theslot and the support member has been turned said support member can

1. Apparatus for suppoRting a housing for a light fixture or the likewithin a recess, wherein opposite walls of the housing each has a slottherein and an enlarged hole at one end of the slot, a substantiallyL-shaped supporting member for each slot, both legs of the member beingwider than the slot, and one of said legs being thinner than the slotand having recesses in each side edge thereof to provide a web at itsend connected to the other leg, said recesses being slightly wider thanthe wall thickness and said web being slightly narrower than the slot,so that said one leg may be passed edgewise through the slot from theinner side of the wall to dispose said recesses within said slot and thesupport member rotated 90* and moved in a direction to cause the web toslide longitudinally within the slot, a pin extending through the otherleg and being of smaller diameter than the slot for passagetherethrough, a head on the end of the pin which faces the wall when theone leg has passed through the slot, said head being larger than theslot but smaller than the hole at one end thereof, so that after the oneleg has been passed edgewise through the slot and the support member hasbeen turned 90*, said support member can be moved in a direction towardthe end of the slot to dispose the head on the pin opposite the hole andthe head may then be turned through the hole, and a nut threaded ontothe other end of the pin for manipulation from said inner side of thewall to tightly engage the other leg and wall between the nut and headon the pin for locating the support member in a desired positionlongitudinally of the slot.